/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @author Sergey I. Salishev
 */
package org.apache.cgiservlet;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

abstract class ContinuedFuture<T> implements Future<T>, Runnable {
	
	private BlockingQueue<T> value = new ArrayBlockingQueue<T>(1);
	private boolean done;

	public boolean cancel(boolean arg0) {
		return false;
	}

	public T get() throws InterruptedException, ExecutionException {
		return value.take();
	}

	public T get(long arg0, TimeUnit arg1) throws InterruptedException,
			ExecutionException, TimeoutException {
		
		return value.poll(arg0, arg1);
	}

	public boolean isCancelled() {
		return false;
	}

	public boolean isDone() {
		return done;
	}
	
	void set(T res) throws InterruptedException {
		value.put(res);
		done = true;
	}

}
